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19922026
Showing 2001 · hep-phShow all

10 papers · 2 filters

hep-ph2001★ 48 cited

Inequalities for generalized parton distributions H and E

P. V. Pobylitsa

New positivity bounds are derived for quark and gluon generalized parton distributions and in spin 1/2 hadrons.

hep-ph2001★ 45 cited

Predictions for azimuthal asymmetries in pion and kaon production in SIDIS off a longitudinally polarized deuterium target at HERMES

A. V. Efremov, K. Goeke, P. Schweitzer

Predictions are made for azimuthal asymmetries in pion and kaon production from SIDIS off a longitudinally polarized deuterium target for HERMES kinematics, based on information on…

hep-ph2001★ 58 cited

Azimuthal asymmetry in electro-production of neutral pions in SIDIS

A. V. Efremov, K. Goeke, P. Schweitzer

Recently HERMES has observed an azimuthal asymmetry in electro-production of neutral pions in semi-inclusive deep-inelastic scattering of unpolarized positrons off longitudinally p…

hep-ph2001★ 46 cited

Strange form factors in the context of SAMPLE, HAPPEX, and A4 experiments

António Silva, Hyun-Chul Kim, Klaus Goeke

The strange properties of the nucleon are investigated within the framework of the SU(3) chiral quark-soliton model assuming isospin symmetry and applying the symmetry conserving S…

hep-ph2001★ 808 cited

Hard Exclusive Reactions and the Structure of Hadrons

K. Goeke, M. V. Polyakov, M. Vanderhaeghen

We outline in detail the properties of generalized parton distributions (GPDs), which contain new information on the structure of the nucleon and which enter the description of har…

hep-ph2001★ 29 cited

Spin-dependent twist-4 matrix elements from the instanton vacuum: Flavor-singlet and nonsinglet

Nam-Young Lee, K. Goeke, C. Weiss

We estimate the twist-4 spin-1 nucleon matrix element f_2 in an instanton-based description of the QCD vacuum. In addition to the flavor-nonsinglet we compute also the flavor-singl…

hep-ph2001★ 157 cited

QCD-based pion distribution amplitudes confronting experimental data

A. P. Bakulev, S. V. Mikhailov, N. G. Stefanis

We use QCD sum rules with nonlocal condensates to re-calculate more accurately the moments and their confidence intervals of the twist-2 pion distribution amplitude including radia…

hep-ph2001★ 39 cited

Soft pion theorem for hard near threshold pion production

P. V. Pobylitsa, M. V. Polyakov, M. Strikman

We prove new soft pion theorem for the near threshold pion production by a hard electromagnetic probe. This theorem relates various near threshold pion production amplitudes to the…

hep-ph2001★ 89 cited

Transversity distributions in the nucleon in the large-N_c limit

P. Schweitzer, D. Urbano, M. V. Polyakov +3

We compute the quark and antiquark transversity distributions in the nucleon at a low normalization point of 600 MeV in the large- limit, where the nucleon can be described as…

hep-ph2001★ 47 cited

Analyticity and power corrections in hard-scattering hadronic functions

A. I. Karanikas, N. G. Stefanis

Demanding the analyticity of hadronic observables (calculated in terms of power series of the running coupling) as a {\it whole}, we show that they are free of the Landau singulari…